Brown tip - What's wrong?

[Orgniv]

Hi guys, i'm fairly new to growing and i have a small plant that has started to get a Brown tip on one of the leafs.

Could this be too much nutes?
Heatstress?
Underwatering/overwatering?

I'm using tap water with nutrients and the pH is around 6-7~ (sorry misswrote)


I know you guys probably cringe over the aluminum foil sorry


Any help is greatly appreciatedd!

 

[ColoradoGriz]

I can't see the picture but your PH is too high for the roots to get full benefit of your nutrients. My understanding anyway.

 

[ColoradoGriz]

 

[Orgniv]

Fixed images